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"Concave lens is also called" Multiple Choice Questions (MCQ) on efficiency with choices diverging lens, converging lens, convex lens, and none of above for online education. Free physics student portal for online learning geometrical optics quiz questions for online degrees.

MCQ: Concave lens is also called

1. diverging lens
2. converging lens
3. convex lens
4. none of above

A

MCQ: Power of a lens is defined as the reciprocal of its

1. focal length in meters
2. principal axis
3. optical center
4. vertex

A

MCQ: A point on the principal axis at the center of lens is known as

1. principal axis
2. optical center
3. principal focus
4. focal length

B

MCQ: As the focal length of a concave lens is positive, therefore its power should be

1. also negative
2. always zero
3. positive
4. neutral

A

MCQ: If an ophthalmologist places a 3.00 diopter lens next to 0.75 diopter lens, the power of lens should be

1. 3 diopters
2. 0.75 diopters
3. 2.25 diopters
4. 3.75 diopters

D